- a black powder, FeO, insoluble in water, soluble in acid.
Origin of ferrous oxide
First recorded in 1870–75
Also called iron monoxide.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A black powder used to make steel, green heat-absorbing glass, and enamels. Chemical formula: FeO.
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